Results 251 to 260 of about 86,014 (287)
Some of the next articles are maybe not open access.
Deep-sea sediments and their geological record
Earth-Science Reviews, 1966Summary The more common types of deep-sea sediments are pelagic clays and calcareous or siliceous lutites rich in the remains of planktonic Protozoa and Protophyta. Accumulation of the various biogenous and mineral elements may take place by settling from the water column above; by transport along the bottom by submarine solifluction, slumping and ...
Cesare Emiliani, John D. Milliman
openaire +1 more source
Modelling Coastal Sedimentation through Geologic Time
Journal of Coastal Research, 2005Abstract Many deterministic numerical models accurately predict wave action and coastal flow but are unable to represent sedimentary processes over geologic times either because their basic equations and numerical implementation do not allow the sediment-water interface to change through time, or because their degree of detail makes geologic-time ...
openaire +1 more source
Geological Extrapolation and Pseud-Abyssal Sediments
AAPG Bulletin, 1942It is considered conceivable that the processes of dynamical geology which are active at the present day are unlikely to have been equally dominant throughout the whole of geological history. Late Neogene time has been a period of intense orogenic activity comparable with earlier epochs of the same character like those of the Caledonian and Hercynian ...
openaire +1 more source
The geological record preserved by Amazon shelf sedimentation
Continental Shelf Research, 1996Abstract A recent study of the subaqueous delta and coastal plain near the mouth of the Amazon River provides insight to the geological record created there and elsewhere. A compound clinoform structure is forming across the Amazon shelf. The uppermost portion is the shoreline, whose aggradation brings the modern sedimentary deposit to sea level and ...
Charles A. Nittrouer +7 more
openaire +1 more source
Phytolithic analysis of geological sediments from Panama
Antiquity, 1985The analysis of phytoliths, microscopic pieces of silica formed within the cells of living plants, is a recent addition to archaeobotanical studies in the New World (Carbone, 1977; Pearsall, 1978; Lewis, 1981; Robinson, 1983; Piperno, 1983, 1984, in press, a; Piperno & Clary, 1984). Because these mineralized bodies are very resistant to destruction
openaire +1 more source
Geological record of megatsunamis in Mediterranean deep sea sediments
2023The Mediterranean Sea hosts two subduction systems along the convergent Africa-Eurasia plate boundary that have produced strong ground shaking and generated tsunamis.  Based on historical descriptions and sedimentary records, one of these events, in 365 CE, impacted a broad geographical area qualifying it as a ‘megatsunami’.
Alina Polonia +7 more
openaire +1 more source
Sediment deformation beneath glaciers: Rheology and geological consequences
Journal of Geophysical Research: Solid Earth, 1987Experiments beneath Breidamerkurjökull in Iceland have led to development of flow laws for the subglacial till, relating strain rate to shear stress and effective pressure and assuming either Bingham fluid or nonlinearly viscous fluid behavior.
G. S. Boulton, R. C. A. Hindmarsh
openaire +1 more source
The Geological Deformation of Sediments
1994Introduction and overview. Mechanical principles of sediment deformation. Glacial deformation. Sedimentary deformational structures. Mass movements. Tectonic deformation - stress paths and strain histories. Fluids in deforming sediments. Melanges - illustrations of the dewatering, deformation, diagenesis interplay.
openaire +1 more source
Three-dimensional geological environment simulation of submarine exhalative sediments
Nonrenewable Resources, 1998On the basis of the major metal grades from the super-large Bainiuchang Ag-rich polymetallic ore deposit, enrichment evolution processes were divided into three populations by using a new multiple time-series model. Population 1 shows the highest temporal/spatial autocorrelation with the ore-forming processes.
Jin Youyu, Zhao Pengda
openaire +1 more source
Comparison of Geological and Engineering Parameters of Marine Sediments
Offshore Technology Conference, 1972Abstract Three-inch diameter piston cores collected from the Gulf of Mexico undergo a large number of geological and soil engineering tests in order to determine relationships between various physical parameters. Electrical resistivity logs are run to determine zones of interest.
Arnold H. Bouma +3 more
openaire +1 more source